<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1 th:text="${msg}"></h1>
<h1>登录</h1>
<form action="/login">
    用户名：<input type="text" name="username">
    密码：<input type="text" name="password">
    <input type="submit">
</form>
</body>
</html>